Bug 831193 (part 1) - Remove uses of NS_MEMORY_REPORTER_IMPLEMENT from nsMemoryReporterManager.cpp.  r=jlebar.

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extra : rebase_source : bb51ea8dcd4600a675a0ce1ddb45d7ced4f8c359
Bug 774315 - Followup to fix the followup. rs=jaws
No bug - Fix nsIURI typos in comments. r=me
Bug 831354, test fix 2, followup:  remove a 'line-height: 0' that's in the test but not the reference.